Builds correlation factors for related OIDs.

This can be expanded to track relationships between different metrics.

Parameters

• _state - Device state (currently unused)

Returns

• Map of correlation factors (currently empty)

Builds comprehensive device state for monitoring and OID responses.

Parameters

• state - Current device state

Returns

• Map containing calculated device metrics and status information

Calculates CPU utilization gauge with realistic load patterns.

Parameters

• state - Device state containing device_type

Returns

• Integer representing CPU utilization percentage (0-100)

Calculates CPU utilization correlated with network activity.

Parameters

• state - Device state

Returns

• Float representing CPU utilization (0.0 to 1.0)

Calculates error increment for error counters with environmental factors.

Parameters

• state - Device state
• counter_type - Type of error counter (:in_errors, :out_errors, etc.)

Returns

• Integer representing error count increment since device start

Calculates error rate as a percentage based on signal quality.

Parameters

• state - Device state

Returns

• Float representing error rate percentage (0.0 to 0.05)

Calculates overall device health score.

Health score is based on signal quality, error rate, and uptime stability.

Parameters

• state - Device state

Returns

• Float representing health score (0.0 to 1.0)

Calculates interface utilization as a percentage.

Parameters

• _state - Device state (currently unused)

Returns

• Float representing interface utilization (0.1 to 0.8)

Calculates packet increment for packet counters.

Parameters

• state - Device state
• counter_type - Type of packet counter (:in_ucast_pkts, :out_ucast_pkts, etc.)

Returns

• Integer representing packet count increment since device start

Calculates signal quality metric.

Parameters

• _state - Device state (currently unused)

Returns

• Float representing signal quality (0.0 to 1.0)

Calculates Signal-to-Noise Ratio (SNR) gauge value for cable modems.

Parameters

• state - Device state containing device_type

Returns

• Integer representing SNR in dB (15-45 range for cable modems)

Calculates storage usage gauge in allocation units (typically KB).

Parameters

• state - Device state containing device_type

Returns

• Integer representing storage usage in allocation units

Calculates device temperature in Celsius.

Temperature is affected by CPU load and ambient conditions.

Parameters

• state - Device state

Returns

• Float representing temperature in Celsius

Calculates traffic increment for counters based on device type and time.

Parameters

• state - Device state
• counter_type - Type of traffic counter (:in_octets, :out_octets, etc.)

Returns

• Integer representing traffic increment since device start

Calculates device uptime in milliseconds.

Parameters

• state - Device state containing uptime_start timestamp

Returns

• Integer representing uptime in milliseconds

Calculates device uptime in SNMP TimeTicks (centiseconds).

Parameters

• state - Device state

Returns

• Integer representing uptime in centiseconds (1/100th of a second)

Extracts OID from SNMP PDU variable binding.

Parameters

• varbind - SNMP variable binding containing OID and value

Returns

• oid - Successfully extracted OID

Extracts type and value from SNMP variable binding.

Parameters

• varbind - SNMP variable binding

Returns

• {type, value} - Tuple containing SNMP type and value

Retrieves multiple OIDs for SNMP GetBulk operations.

Parameters

• oid - Starting OID
• count - Maximum number of OIDs to retrieve
• state - Device state

Returns

• List of {oid, type, value} tuples

Gets dynamic OID value based on device state and OID.

Parameters

• oid - OID as string
• state - Device state containing configuration and counters

Returns

• {:ok, {type, value}} - Successfully retrieved OID value with type
• {:error, reason} - Failed to retrieve OID value

Gets fallback bulk OIDs for SNMP GetBulk operations.

Parameters

• oid - Starting OID
• count - Maximum number of OIDs to retrieve
• state - Device state

Returns

• List of {oid, type, value} tuples

Gets fallback next OID for SNMP GetNext operations.

Parameters

• oid_list - Starting OID as list of integers
• state - Device state

Returns

• {next_oid, type, value} - Next OID with its type and value

Gets interface description based on device type.

Parameters

• state - Device state containing device_type

Returns

• String description of the interface

Finds the next OID in lexicographic order for SNMP GetNext operations.

Parameters

• oid - Starting OID as list of integers
• state - Device state

Returns

• {:ok, {next_oid, type, value}} - Next OID with its type and value
• {:error, :end_of_mib} - No more OIDs available

Gets OID value based on device state and OID.

Parameters

• oid - OID as list of integers or binary string
• state - Device state containing configuration and counters or device type

Returns

• {:ok, value} - Successfully retrieved OID value
• {:error, reason} - Failed to retrieve OID value

Gets time-of-day factor for simulating traffic patterns.

Peak traffic occurs during evening hours (8-10 PM) with lower utilization during overnight and early morning hours.

Returns

• Float representing traffic multiplier (0.6 to 1.5)

Handles DOCSIS SNR OID.

Parameters

• oid - DOCSIS SNR OID as string
• state - Device state

Returns

• {:ok, value} - Successfully retrieved OID value
• {:error, reason} - Failed to retrieve OID value

Handles high capacity interface OID.

Parameters

• oid - High capacity interface OID as string
• state - Device state

Returns

• {:ok, value} - Successfully retrieved OID value
• {:error, reason} - Failed to retrieve OID value

Handles Host Resources processor OID.

Parameters

• oid - Host Resources processor OID as string
• state - Device state

Returns

• {:ok, value} - Successfully retrieved OID value
• {:error, reason} - Failed to retrieve OID value

Handles Host Resources storage OID.

Parameters

• oid - Host Resources storage OID as string
• state - Device state

Returns

• {:ok, value} - Successfully retrieved OID value
• {:error, reason} - Failed to retrieve OID value

Handles interface OID.

Parameters

• oid - Interface OID as string
• _state - Device state (unused)

Returns

• {:ok, value} - Successfully retrieved OID value
• {:error, reason} - Failed to retrieve OID value

Converts OID list to string representation.

Parameters

• oid - List of integers representing OID

Returns

• String representation of OID (e.g., "1.3.6.1.2.1.1.1.0")

Converts string OID to list of integers.

Parameters

• oid_string - String representation of OID

Returns

• List of integers representing OID

Walks OID values for SNMP MIB walking.

Parameters

• oid - Starting OID as list of integers
• state - Device state

Returns

• {:ok, oid_values} - List of OID values